An unusual presentation of adult Wilms' tumor

Wilms' tumor (nephroblastoma), a primary renal neoplasm containing primitive blastema and embryonic glomerulotubular structures, is the most common malignant tumor of the urinary tract in children. There have been about 240 cases of adult Wilms' tumor reported in the world literature, however due to some differences in histologic findings, many cases have been reclassified as rhabdoid or clear cell sarcomas, both of which are recognized as separate entities. We report a case of an adult Wilms' tumor and discuss the clinical, radiographic and histologic features of this tumor.

Opportunistic infections of the central nervous system in children with HIV infection: report of 9 autopsy cases and review of literature

Central nervous system (CNS) abnormalities attributed to direct effects of HIV infection are seen in most of children with acquired immunodeficiency syndrome (AIDS). Secondary CNS infections with opportunistic and common pathogens are infrequent in this age group. We report 9 cases of opportunistic infection of the CNS found among 65 autopsy cases of pediatric AIDS. These included 4 cases of cytomegalovirus (CMV) infection, 1 of which was associated with aspergillosis, and 2 cases of candidiasis, 1 of which coexisted with Mycobacterium avium intracellulare (MAI) infection. There were also 2 cases of leptomeningitis, 1 due to Mycobacterium tuberculosis (MTB) and the other to Cryptococcus neoformans. In 1 child progressive multifocal leukoencephalopathy (PML) coexisted with mycotic encephalitis caused by an Aspergillus sp.

Noonan's syndrome associated with polycistic renal disease

Noonan's syndrome is an eponymic designation that has been used during the last 8 years to describe a variable constellation of somatic and visceral congenital anomalies, which includes groups of patients previously referred to as male Turner's, female pseudo-Turner's and Bonnevie-Ullrich syndromes. It is now recognized that both sexes may show the stigmas of this condition and, unlike Turner's syndrome, there is no karyotype abnormality although there is often a familial pattern. The most commonly observed anomalies include webbing of the neck, hypertelorism, a shield-shaped chest and short stature. Congenital heart disease, principally pulmonary stenosis, and sexual infantilism often with cryptorchidism in the male subject are additional associated anomalies in this syndrome. Renal anomalies have been described rarely and usually consist of rotational errors, duplications and hydronephrosis. We report the first case of an infant who displayed many of the stigmas of Noonan's syndrome and also showed early evidence of frank renal failure secondary to renal dysplasia with cystic disease.